Rock-drill.



'C. H. HAESELER.

ROCK DRILL APPLICATION FILED FEB. 24, 1916.

C. H. HAESELER.

ROCK DRILL.

APPLICATIUN FILED FEB. 24. 1916.

Lmm. Patented Feb.' 6,1917.

3 SHEETS-SHEET 2.

C. H. HAESELEH.

ROCK DRILL.

APPLICATION HLED FEB.2 4,1916.

Patented F @HABILES H. HAESELER, 0F PHILADELPHIA, PENNSYIV t i noon-Darm..

Specification of Letters Patent.

rammen ree. e, rete.'

Application led February 2a, 1916. Serial No. 80,109.

To all lwhom t may concern:

Be it known thatk I, CHARLES H. HAESELER, a citizen` of the United States, residing in the city of Philadelphia, county of `Philadelphia, and State of Pennsylvania, have invented certain improvements in Rock-Drills, of which the following is a specication.

My invention is a rock drill of peculiar construction designed to provide `simplicity, strength, durability, efciency and iexibility in operation.

My invention is characterized by improved means for intermittently delivering water to and through a hollow drill steel to its cutting face (to cool the cutting point, allay the dust, and remove cuttings from the bottom of the hole); for connecting the steels or cutting tools with the percussive mechanism; and for controlling the exhaust ports to regulate the action of the percussive mechanism and supplement the action of the water in removing cuttings or detritus that may have accumulated in the hole ,being drilled.

A desideratum attained by my invention is the intermittent supply, at predetermined intervals, and the delivery through the drill steels of the amount of water desired for allaying .the dust and washing out the cuttings,l with ecient results and saving in water.

A further desideratum is attained by the peculiar means devised for connecting the drill steels so that they are held in their desired relation and are removable without difficulty when this is desired.

A further desideratum results from the special means for controlling the live air and providing additional means for blowing out the detritus from the hole cut by the drill steel.

rlhe nature and advantages of my improvements will be fully understood by reference to the following description and the accompanying drawings of a preferred embodiment thereof.

in the drawings, Figure 1 is a longitudinal sectional view of a form of the construction selected for illustrating the improvements; Fig. 2 is a part sectional elevation of the same construction viewed at right angles to the position shown in Fig.; 1; Fig. 3 is an in wedging relation so enlarged longitudinal sectional view taken through the lower part of the'mechanism; Fig. 4 isa sectional view taken on the line 4 4 of Fig. 3; Fig. 5 is a sectional view taken on the line 5-5 of Fig. 3; Fig. 6 is a sectional view taken on the line 6-6 of Fig. 3; Fig. 7 is a side elevation of the mechanism, illustrating the exterior construction'of the means for supplying water and regulating the air; Fig. 8 1s a sectional view taken on the lines 8-8 of Figs. 3 and 7; Fig. 9 is an enlarged detailed view of the improved means for controlling the air in one position of said means; and Fig. 10 shows a second position of the mechanism illustrated in Fig. 9.

rlihe drill, in the form thereof illustrated in the drawing,- comprises the casing 1 containing the alined cylinders 2, 3, and 4. A piston 5 acts in the cylinder 2 and has fixed thereto a reduced section or hammer 6 which acts in the cylinder 3. A stock 7 is pro vided with the cylindrical section 8 which acts in the cylinderv 4, and with an angular, as a hexagonal, section 9 on the end of the section 8, the section 9 acting in a corresponding bearing 10. The stock 7 is provided with a socket 11 adaptedfor receiving the conforming end of the drill steel 12, with suitably spaced apertures 13 adapted for the reception of the radially mova le tapered gibs 14 designed to grip the steel, and with a male screw thread 15 adapted for engaging a female screw thread 16 of a revoluble sleeve 17, the latter having a tapered or conical inner surface 18 ada ted for engaging the inclined exterior sur aces of the gibs as to cause them to grip the steel securely. The threads 15 and 16 are preferably formed so as to provide limited play between them longitudinally of the drill, the grooves between the teeth being enlarged to permit this limited ree action.

ln drill chucks heretofore constructed having a tapered sleeve engaging a correspending taper of the gibs for holding the drill steel, it frequently happens that the j ar resulting from the operation of the drill will cause the sleeve to creep farther on the By the arrangement above described, the

sleeve 17 may be drawn up by means of the screw threads so as to cause the gibs vto gripv the steel, and upon the operation of the machine a further longitudinal movement of the sleeve is permitted, resulting from the` jar of the hammer blows, so that it more tightly grips the gibs, such additional longitudinal movement of the sleeve being limited however by the engagement of the lower faces of the chuck threads with the upper faces of the sleeve threads, whereby jammin is avoided and the-sleeve may bereadily acked of or released by means of a wrench or hammer blow on the lugs. e

The stock 7 is provided with an axial passage 1,9 extending from the socket 11' through the parts 8 and 9, and the steel 12 (with its cylindrical contour terminating in a rounded end conforming to the like socket '11) is provided with the axial passage 20 in alinement with the passage 19. A small port or passage 21 extends from a point in a fiat face of the section 9 into the passage 19, the port being constantly in the cylinder or cylindrical sleeve 4 and in communication with a port 22 of said cylinder. The port 22 is connected intermittently with a passage 23 which communicates with a passage 24 in a hub 25 on the casing. 'The hub 25 hasa'water conduit 26 fixed thereto,

in communication with the passage 24, by a sleeve 27. .The sleeve 27 and a plug 28, for closing the end of the passage, are locked by plungers 29 and 30 held in engagement therewith by a spring 31.

The cylinder .or cylindrical sleeve 4 is revoluble in the lower end of the casing 1 by fixing to its upper end a toothed barrel 32 which meshes with a driving pinion 33 fixed on a journal shaft 34, the shaft being driven by providing it with a worm wheel 35 and engaging such wheel by a worm 36 fixed to and driven by the rotary motor 37. It will be understood that this motor, act! ing through the intermediate mechanism, revolves the cylindrical sleeve 4 and, through its engagement with the hexagonal section 9, the stock 7 and steel 12 constantly, causing the port 22 to register intermittently with the passage 23 and to be closed by the casing 1 at other times. This effects the admission of water through the port 21 and passages 19 and 2O intermittently, the periodic admission of water elfecting the work of allaying the dust and washing out the drilled hole more eiiciently with less water than where it is constantly admitted.

The hammer or piston section 6 contains an axial passage 38 connected by the branch passages 38 with the cylinder and in alinement with the passage 19.

A passage 39 in the wall of the case is in constant communication with the forward endof the cylinder 2 and thepassages 38. A passage or port '40 is adapted for com- -munication with the cylinder 2 and the passages 38, inthe rearward position of the piston 5. A passage`41- is adapted for communication with Vthe cylinder 2 in the forward position of the piston 5. The passage 39 communicates with a valve-chamber 42 under controlvof a valve 43 containing ports 44 and 45, the ports 40 and 41 be trated in Figs'. 1 and 9, thereisfree communication between the cylinder spaces at theiopposite ends of the piston 5 through the passages 39, 44, 42,' and 41, without loss of air to the atmosphere excepting throughV the passages 38', 38, 19 and 20, whereby special means are provided for blowing the detritus out of the hole made by the drill. In the position of the valve or bonnet 43 illustrated in Fig. 10, the passage 39 is closed, the passages 40 and 41 are in communication with the atmosphere through the now open ports 45 and air escapes from the cylinder 2 to the atmosphere when the piston 5 is in position for establishing communication between such cylinder andthe respective ports 40 and 41.

Having described my invention, I claim:

1. In a rock drill, the combination of a stock having a longitudinal socket,'trans verse ways anda male thread, with a steel having an end in said socket, gibs movable in said ways to clamp said steel, and a sleeve having an inner surface engaging said giibs in wedging relation and a female threa engaging` said male thread in loose relation so as to permit a limited lateral movement between said threads. 2.Inarockdrill,havingacaseanda percussive tool adapted to reciprocate in said case, a stock connected with said case so as to be movable relativelyA thereto by said t0ol,'said stock having a thread, a drill steel, and means connecting said stock with said case and fixing said steel to said stock, said means comprising a thread loosely engaging said thread irst named so as to provide limited lateral movement between said threads.

3. In a rock drill, having a'case and a. percussive tool adapted toreciprocate in said case, a stock connected with said case so as to be movable relatively thereto by said tool, said stock having a screw thread,

a drill steel, and means for loosely coupling to tighten without jamming the grip on said stock to said case and iXing said steel said steel.

to said stock, said means comprising a screw ln testimony whereof, l have hereunto 10 thread loosely engaging said thread rst set my name this 23rd day of February, named so as to provide limited lateral move- 1916'. g

ment between said threads, whereby said. means are operated by the blow of the tool CHARLES H. HAESELER. 

